Carbon fiber continuous fiber reinforcing polyether-ether-ketone matrix composite material and preparing method thereof

Abstract

The invention discloses a carbon fiber continuous fiber reinforcing polyether-ether-ketone matrix composite material and a preparing method thereof, and belongs to the technical field of thermoplastic composite materials. The preparing method comprises the first step of adopting a spinning-grade polyether-ether-ketone special material to prepare polyether-ether-ketone multifilament with the linear density being 12-380D / 12F through a melt spinning method; the second step of chopping the polyether-ether-ketone multifilament into 30-80 mm through a fiber cut-off machine to obtain polyether-ether-ketone continuous fiber, and chopping the carbon fiber into 20-70mm to obtain carbon fiber continuous fiber; the third step of conducting mixing, carding, lapping, needling on the polyether-ether-ketone PEEK continuous fiber and carbon fiber CF continuous fiber according to the mass ratio of 50%-70% to 50%-30% to prepare a CF / PEEK compound needled felt prefabricated part; the fourth step of conducting hot-pressing, exhausting, cooling and demolding on the obtained CF / PEEK compound needled felt prefabricated part on a vacuum hot-pressing machine to obtain the carbon fiber continuous fiber reinforcing polyether-ether-ketone matrix composite material. No solvent is involved in the process, the carbon fiber continuous fiber reinforcing polyether-ether-ketone matrix composite material does not pollute the environment, the technology is short in process, the prepared composite material is higher in intensity, the material aspect ratio of strength is lowered.

Description

technical field [0001] The invention belongs to the technical field of thermoplastic composite materials, and in particular relates to a carbon fiber long fiber reinforced polyetheretherketone-based composite material and a preparation method thereof. Background technique [0002] As a new type of composite material that can be designed and recycled repeatedly, long fiber reinforced thermoplastic resin matrix composites (LFT) make up for the shortcomings of poor performance of short fiber reinforcement and high cost of continuous fiber reinforcement. Due to its broad application prospects in recent years It has been widely concerned by domestic and foreign scientific research institutes and industrial circles. The fiber length of traditional short fiber reinforced resin matrix composites (SFT) is generally less than 3 mm, and the fibers are randomly distributed in the resin, which cannot fully exert the reinforcing effect on the resin. In contrast, long fiber reinforced ther...

AI Technical Summary

Problems solved by technology

However, the commonly used G-LFT and E-LFT have problems such as unsatisfactory structural design, unsuitability for high-viscosity resins, and difficulty in accurately controlling the content of fibers. It is difficult to achieve good fiber dispersion for carbon fiber long-fiber reinforced polyetheretherketone-based composites. and impregnation effect, the more advanced D-LFT and S-LFT core technologies are monopolized, and domestic research has just started